Subtronics India Pvt. Ltd. Offers Police Type Flasher with Red Bright Light Visible Plastic Dome. Subtronics India Pvt. Ltd. Is an ISO 9001:2000 certified company. Police Type Flasher with Red Bright Light Visible Plastic Dome requires an operating voltage of six volts with four "D" size batteries. It gives 70 flashes per minute. This electronic flasher needs charging from four or five hours. Police Type Flasher with Red Bright Light Visible Plastic Dome features On/Off switches. It has yellow LED Indicator to show low battery signal. A female jack is provided for the charger.